[PD] file format for GEM

[Stephan Elliot Perez]

Thanks, it works now. For some reason, turning "auto" on and off (with
pix_film) causes the video to lag temporarily, but I do not have this
problem if I use line-objects to go through the frames. The cpu-usage goes
above 100 if I have more than two videos playing at once, but I suppose I
don't need more than two for this project...

Also, what can I do if I want an additive blend instead of a normal
cross-blend?


On Tue, Feb 26, 2013 at 10:16 PM, Cyrille Henry <ch at chnry.net> wrote:

> hello,
> Gem is mostly design to work on the GPU, and not on the CPU.
> GPU have hundreds of core, they are faster than CPU for image
> manipulations.
>
> pix_add come from the 20th century and should now be avoid since it use
> cpu not gpu ;-)
>
> in order to make a fade transition between 2 videos, you can use
> transparency on one video.
> add a [alpha] object after Gemhead, and send number between 0 and 1 in the
> last inlet of the colorRGB object to make the video appear / disapear.
>
> cheers
> c
>
>
> Le 26/02/2013 21:33, Stephan Elliot Perez a écrit :
>
>> Hello,
>>         So, looking at the help file for [pd~], it seems to be primarily
>> for audio. How can I use multiple cores to work purely with GEM?
>>          I am trying to have a simple transition between video clips, but
>> if I have two instances of pix_film and then connect them to pix_add, the
>> CPU-ussage skyrockets well above 100... is there a more efficient object
>> for blending two video clips?
>>
>> Best regards,
>> Stephan
>>
>> On Sun, Feb 3, 2013 at 10:54 PM, Thomas Mayer <thomas at residuum.org<mailto:
>> thomas at residuum.org>> wrote:
>>
>>     Hi,
>>
>>     On 03.02.2013 22:48, Stephan Elliot Perez wrote:
>>      > I am talking about PD's CPU meter. I don't have the impression
>> that PD
>>      > takes full advantage of 2 quad-core processors. When processing
>> audio,
>>      > anything over 100 in PD's meter will lead to glitched audio. I am
>> just
>>      > wondering if it will be much more when I load other videos and
>> transition
>>      > between them.
>>
>>     Pd will only use one core, and one core for the GUI. There are ways to
>>     distribute the load over several cores, e.g. [pd~] or use several
>>     instances of Pd that communicate with each others:
>>
>>     http://www.mail-archive.com/**pd-list@iem.at/msg33319.html<http://www.mail-archive.com/pd-list@iem.at/msg33319.html>
>>
>>     Hth,
>>     Thomas
>>     --
>>     "Spielen Sie Strip Schnipp-Schnapp?" (Adam Weishaupt to Johann
>>     Wolfgang von Goethe in: Robert Shea & Robert A. Wilson, The Golden
>>     Apple)
>>     http://www.residuum.org/
>>
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